lavoy

iTrader: (2)

in for answer to for my next build. my current build is a junk yard 4.8 bottom end with a precision 74mm t4 turbo i run 20 psi im not sure what my whp is but i am on pump 93 and meth and a intercooler and i am trapping 150 mph in a 2900 car so i guess around 700 whp

73turbo53

CALL911

Just in case you didnt know one of the fastest JY 5.3 turbo's in the country only lives about 10 mins from you. Silver_82 has been making 950 to 1000 hp most the summer with no engine issues on e85. Next spring with a lot of help from him i will be also. You need to talk to him about what works since he has done a great job putting together a solid combo. Also, remember that unless you just planning on hitting the car show circuit with the other ls cars in town next year you will need quite a bit of track time to get the suspension sorted out. You should really reconsider dumping the meth and going e85. Especially since we are lucky enough to have it all around and unless you are racing in the winter the blends have shown little effect on the tune just cruising around.

lavoy

iTrader: (2)

yeah i wish we had e85 around here, but we dont so pump and meth is all i can do. you guys are lucky. the thing that bothers me is right now the reason e85 is so cheap is the government subsidizes its cost, once the grants end it will go way up in cost. still cheaper then race gas though.

skinnies

iTrader: (33)

My setup, was in my rx7 with 9" and 33" tires so dyno numbers aren't the best for true numbers, but it made 855rwhp and went 167.9mph in the 1/4 so power was definitely there.

JY 5.3, gt2-3, stock heads, ls9 gaskets, good springs/pushrods, arp head studs, ls6 intake, stock tb.

The other is Dilsnicks mustang we built, same as above but ls6 cam and proflo intake, made 854rwhp on lower timing.

Both setups on ~24lbs, both setups are stalled autos to so that that into account. Both were done on e85, but the tune ups COULD be done with meth/pump gas(although I don't care for it at all).

CALL911

iTrader: (17)

Thanks for getting back with me. I think since both these setups were through non-bodies, as you said it may not be a good judgement of RWHP.

I think I'm leaning more towards doing this with a 6.0 now.

2000RATA

If you aren't going aftermarket with heads then use these. A ported 5. 3 head is perfect for this.

CALL911

iTrader: (17)

If I go the way I plan, it will probably be the 6.0. And if that is the case, I will do the 317 heads, and probably sell my long block, or if I feel I can get more money out of it, part out the long block.